Open-air stove



FIG. 1 is a top perspective view of an open air stove showing my new design; and,

FIG. 2 is a bottom perspective view of the open air stove shown in FIG. 1.

The portions of the article not shown in FIGS. 1 and 2 or described in the specification form no part of the claimed design. 

The ornamental design for an open air stove, as shown and described. 